export const SERVER_HEALTH_MAX_COUNT = 30;
export const SERVER_HEALTH_CONCURRENCY = 4;

export async function checkServerHealth(servers, ping, {
  maxCount = SERVER_HEALTH_MAX_COUNT,
  concurrency = SERVER_HEALTH_CONCURRENCY,
} = {}) {
  const queue = servers.slice(0, maxCount);
  const results = new Array(queue.length);
  let nextIndex = 0;

  async function worker() {
    while (nextIndex < queue.length) {
      const index = nextIndex++;
      const server = queue[index];
      results[index] = {
        id: server.id,
        tag: server.label,
        ...await ping(server.host, server.port),
        checkedAt: new Date().toISOString(),
      };
    }
  }

  await Promise.all(Array.from({ length: Math.min(concurrency, queue.length) }, worker));
  return results;
}